Conference on Integer and Combinatorial Optimization, Balas, E., & Clausen, J. (1995). Integer programming and combinatorial optimization: 4th International IPCO Conference, Copenhagen, Denmark, May 29-31, 1995 : proceedings. Springer.

Conference on Integer and Combinatorial Optimization, Egon Balas, and Jens Clausen. Integer Programming and Combinatorial Optimization: 4th International IPCO Conference, Copenhagen, Denmark, May 29-31, 1995 : Proceedings. Berlin ; New York: Springer, 1995.

Conference on Integer and Combinatorial Optimization, et al. Integer Programming and Combinatorial Optimization: 4th International IPCO Conference, Copenhagen, Denmark, May 29-31, 1995 : Proceedings. Springer, 1995.